package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @author 赵雨强
 * @create 2021/8/8 7:18
 * @description 服务层
 */
@Service
public class PaymentService {
    /**
     * 正常访问，一切OK
     *
     * @param id 传去的参数
     * @return 返回字符串
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "    paymentInfo_ok,id:  " + id + "lalal!";
    }


    /**
     * 模拟访问异常,超时访问，演示降级，
     * 也就是当访问出现异常和超时的时候，转而调用定义好的其他方法。
     * 当方法执行时间超过设定的value时，就会转到处理它的方法
     * @param id 传去参数
     * @return 返回字符串
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeoutHandler"
            , commandProperties = {
                                    @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
                                    })
    public String paymentInfo_TimeOut(Integer id) {
        int timeNumber = 3;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + "    paymentInfo_Timeout,id:  " + id + "wuwu!" + timeNumber;
    }


    /**
     * 服务降级方案
     * @param id
     * @return
     */
    public String paymentInfo_TimeoutHandler(Integer id) {
        return "/(ToT)/调用支付接口超时或异常、\t" + "\t当前线程池名字" + Thread.currentThread().getName();
    }




    // 服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),              //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),    //请求数达到后才计算
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), //休眠时间窗
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),  //错误率达到多少跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("****id 不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName() + "\t" + "调用成功，流水号：" + serialNumber;
    }


    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能为负数,请稍后再试， o(╥﹏╥)o id: " + id;
    }


}
